Mask not working on twenty twenty-one theme posts

Good afternoon guys!

I’m using the twenty twenty-one theme and I noticed that when the mask only works on pages, it doesn’t work on posts (including custom posts).

I added the same form on a page and in a separate post. The first one returned with the mask in the phone field normally, but in the post the mask is ignored.

Do you know how to fix this in the theme? For now I would prefer to continue with this theme due to the changes I have already made to it, but I am having difficulties with this issue.